Browse Publications Technical Papers 930654
1993-03-01

Impact Model for Accident Reconstruction - Normal and Tangential Restitution Coefficients 930654

A two-dimensional impact model with a capability of reverse calculation has been developed to reconstruct various types of automobile collisions. The model consists of a law of conservation of momentum and introduces a normal restitution coefficient and a tangential restitution coefficient at the impact center. Sixteen car-to-car impact tests, including side swipe type collisions, were conducted to obtain primary data for validating the model and improving its reliability in accident analysis. The relationship of the normal and tangential restitution coefficients to the collision type was obtained with a generalized impulse ratio from the analysis of test data by using the impact model.
This paper presents the formulas used in the model and demonstrates their applications to accident analysis. The following analytical formulas are introduced:
  • The relationship between energy loss and delta-V.
  • The relationship between restitution coefficients and energy loss.
  • The relationship between equivalent friction coefficient and tangential restitution coefficient.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Preview Document Add to Cart
Members save up to 16% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Impact Center and Restitution Coefficients for Accident Reconstruction

940564

View Details

TECHNICAL PAPER

Crash Pulse Scaling Applied to Accident Reconstruction

2008-01-0183

View Details

TECHNICAL PAPER

The Effect of Duration, Rate of Onset, and Peak Sled Acceleration on the Dynamic Response of the Human Head and Neck

760800

View Details

X